*
* Copyright (C) 2009-2010 by David Brownell
*
+ * Copyright (C) 2020-2021, Ampere Computing LLC *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
/*#define DEBUG_WAIT*/
/* JTAG instructions/registers for JTAG-DP and SWJ-DP */
-#define JTAG_DP_ABORT 0x8
-#define JTAG_DP_DPACC 0xA
-#define JTAG_DP_APACC 0xB
-#define JTAG_DP_IDCODE 0xE
+#define JTAG_DP_ABORT 0xF8
+#define JTAG_DP_DPACC 0xFA
+#define JTAG_DP_APACC 0xFB
+#define JTAG_DP_IDCODE 0xFE
/* three-bit ACK values for DPACC and APACC reads */
#define JTAG_ACK_OK_FAULT 0x2
static int jtag_ap_q_abort(struct adiv5_dap *dap, uint8_t *ack);
#ifdef DEBUG_WAIT
-static const char *dap_reg_name(int instr, int reg_addr)
+static const char *dap_reg_name(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr)
{
char *reg_name = "UNK";
}
if (instr == JTAG_DP_APACC) {
- switch (reg_addr) {
- case MEM_AP_REG_CSW:
+ if (reg_addr == MEM_AP_REG_CSW(dap))
reg_name = "CSW";
- break;
- case MEM_AP_REG_TAR:
+ else if (reg_addr == MEM_AP_REG_TAR(dap))
reg_name = "TAR";
- break;
- case MEM_AP_REG_DRW:
+ else if (reg_addr == MEM_AP_REG_TAR64(dap))
+ reg_name = "TAR64";
+ else if (reg_addr == MEM_AP_REG_DRW(dap))
reg_name = "DRW";
- break;
- case MEM_AP_REG_BD0:
+ else if (reg_addr == MEM_AP_REG_BD0(dap))
reg_name = "BD0";
- break;
- case MEM_AP_REG_BD1:
+ else if (reg_addr == MEM_AP_REG_BD1(dap))
reg_name = "BD1";
- break;
- case MEM_AP_REG_BD2:
+ else if (reg_addr == MEM_AP_REG_BD2(dap))
reg_name = "BD2";
- break;
- case MEM_AP_REG_BD3:
+ else if (reg_addr == MEM_AP_REG_BD3(dap))
reg_name = "BD3";
- break;
- case MEM_AP_REG_CFG:
+ else if (reg_addr == MEM_AP_REG_CFG(dap))
reg_name = "CFG";
- break;
- case MEM_AP_REG_BASE:
+ else if (reg_addr == MEM_AP_REG_BASE(dap))
reg_name = "BASE";
- break;
- case AP_REG_IDR:
+ else if (reg_addr == MEM_AP_REG_BASE64(dap))
+ reg_name = "BASE64";
+ else if (reg_addr == AP_REG_IDR(dap))
reg_name = "IDR";
- break;
- default:
+ else
reg_name = "UNK";
- break;
- }
}
return reg_name;
struct dap_cmd {
struct list_head lh;
uint8_t instr;
- uint8_t reg_addr;
+ uint16_t reg_addr;
uint8_t rnw;
uint8_t *invalue;
uint8_t ack;
struct dap_cmd cmd;
};
-static void log_dap_cmd(const char *header, struct dap_cmd *el)
+static void log_dap_cmd(struct adiv5_dap *dap, const char *header, struct dap_cmd *el)
{
#ifdef DEBUG_WAIT
LOG_DEBUG("%s: %2s %6s %5s 0x%08x 0x%08x %2s", header,
el->instr == JTAG_DP_APACC ? "AP" : "DP",
- dap_reg_name(el->instr, el->reg_addr),
+ dap_reg_name(dap, el->instr, el->reg_addr),
el->rnw == DPAP_READ ? "READ" : "WRITE",
buf_get_u32(el->outvalue_buf, 0, 32),
buf_get_u32(el->invalue, 0, 32),
}
static struct dap_cmd *dap_cmd_new(struct adiv5_dap *dap, uint8_t instr,
- uint8_t reg_addr, uint8_t rnw,
+ uint16_t reg_addr, uint8_t rnw,
uint8_t *outvalue, uint8_t *invalue,
uint32_t memaccess_tck)
{
if (list_empty(&dap->cmd_pool)) {
pool = calloc(1, sizeof(struct dap_cmd_pool));
- if (pool == NULL)
+ if (!pool)
return NULL;
} else {
pool = list_first_entry(&dap->cmd_pool, struct dap_cmd_pool, lh);
cmd->instr = instr;
cmd->reg_addr = reg_addr;
cmd->rnw = rnw;
- if (outvalue != NULL)
+ if (outvalue)
memcpy(cmd->outvalue_buf, outvalue, 4);
- cmd->invalue = (invalue != NULL) ? invalue : cmd->invalue_buf;
+ cmd->invalue = (invalue) ? invalue : cmd->invalue_buf;
cmd->memaccess_tck = memaccess_tck;
return cmd;
cmd->fields[0].num_bits = 3;
buf_set_u32(&cmd->out_addr_buf, 0, 3, ((cmd->reg_addr >> 1) & 0x6) | (cmd->rnw & 0x1));
cmd->fields[0].out_value = &cmd->out_addr_buf;
- cmd->fields[0].in_value = (ack != NULL) ? ack : &cmd->ack;
+ cmd->fields[0].in_value = (ack) ? ack : &cmd->ack;
/* NOTE: if we receive JTAG_ACK_WAIT, the previous operation did not
* complete; data we write is discarded, data we read is unpredictable.
* See "Minimum Response Time" for JTAG-DP, in the ADIv5 spec.
*/
if (cmd->instr == JTAG_DP_APACC) {
- if (((cmd->reg_addr == MEM_AP_REG_DRW)
- || ((cmd->reg_addr & 0xF0) == MEM_AP_REG_BD0))
- && (cmd->memaccess_tck != 0))
+ if ((cmd->reg_addr == MEM_AP_REG_DRW(dap) ||
+ (cmd->reg_addr & 0xFF0) == MEM_AP_REG_BD0(dap)) &&
+ cmd->memaccess_tck != 0)
jtag_add_runtest(cmd->memaccess_tck, TAP_IDLE);
}
*/
static int adi_jtag_dp_scan(struct adiv5_dap *dap,
- uint8_t instr, uint8_t reg_addr, uint8_t rnw,
+ uint8_t instr, uint16_t reg_addr, uint8_t rnw,
uint8_t *outvalue, uint8_t *invalue,
uint32_t memaccess_tck, uint8_t *ack)
{
int retval;
cmd = dap_cmd_new(dap, instr, reg_addr, rnw, outvalue, invalue, memaccess_tck);
- if (cmd != NULL)
+ if (cmd)
cmd->dp_select = dap->select;
else
return ERROR_JTAG_DEVICE_ERROR;
{
int retval = ERROR_OK;
- if (dap->last_read != NULL) {
+ if (dap->last_read) {
retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, 0, dap->last_read, 0, NULL);
dap->last_read = NULL;
}
static int adi_jtag_scan_inout_check_u32(struct adiv5_dap *dap,
- uint8_t instr, uint8_t reg_addr, uint8_t rnw,
+ uint8_t instr, uint16_t reg_addr, uint8_t rnw,
uint32_t outvalue, uint32_t *invalue, uint32_t memaccess_tck)
{
int retval;
/* For reads, collect posted value; RDBUFF has no other effect.
* Assumes read gets acked with OK/FAULT, and CTRL_STAT says "OK".
*/
- if ((rnw == DPAP_READ) && (invalue != NULL)) {
+ if ((rnw == DPAP_READ) && (invalue)) {
retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, 0, invalue, 0, NULL);
if (retval != ERROR_OK)
/* skip all completed transactions up to the first WAIT */
list_for_each_entry(el, &dap->cmd_journal, lh) {
if (el->ack == JTAG_ACK_OK_FAULT) {
- log_dap_cmd("LOG", el);
+ log_dap_cmd(dap, "LOG", el);
} else if (el->ack == JTAG_ACK_WAIT) {
found_wait = 1;
break;
} else {
LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack);
- log_dap_cmd("ERR", el);
+ log_dap_cmd(dap, "ERR", el);
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
if (found_wait && el != list_first_entry(&dap->cmd_journal, struct dap_cmd, lh)) {
prev = list_entry(el->lh.prev, struct dap_cmd, lh);
if (prev->rnw == DPAP_READ) {
- log_dap_cmd("PND", prev);
+ log_dap_cmd(dap, "PND", prev);
/* search for the next OK transaction, it contains
* the result of the previous READ */
tmp = el;
list_for_each_entry_from(tmp, &dap->cmd_journal, lh) {
if (tmp->ack == JTAG_ACK_OK_FAULT) {
/* recover the read value */
- log_dap_cmd("FND", tmp);
+ log_dap_cmd(dap, "FND", tmp);
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(tmp->invalue);
memcpy(el->invalue, &invalue, sizeof(uint32_t));
}
}
- if (prev != NULL) {
- log_dap_cmd("LST", el);
+ if (prev) {
+ log_dap_cmd(dap, "LST", el);
/*
* At this point we're sure that no previous
*/
tmp = dap_cmd_new(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, NULL, NULL, 0);
- if (tmp == NULL) {
+ if (!tmp) {
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
if (retval != ERROR_OK)
break;
if (tmp->ack == JTAG_ACK_OK_FAULT) {
- log_dap_cmd("FND", tmp);
+ log_dap_cmd(dap, "FND", tmp);
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(tmp->invalue);
memcpy(el->invalue, &invalue, sizeof(uint32_t));
}
if (tmp->ack != JTAG_ACK_WAIT) {
LOG_ERROR("Invalid ACK (%1x) in DAP response", tmp->ack);
- log_dap_cmd("ERR", tmp);
+ log_dap_cmd(dap, "ERR", tmp);
retval = ERROR_JTAG_DEVICE_ERROR;
break;
}
/* move all remaining transactions over to the replay list */
list_for_each_entry_safe_from(el, tmp, &dap->cmd_journal, lh) {
- log_dap_cmd("REP", el);
+ log_dap_cmd(dap, "REP", el);
list_move_tail(&el->lh, &replay_list);
}
/* check for overrun condition in the last batch of transactions */
if (found_wait) {
- LOG_INFO("DAP transaction stalled (WAIT) - slowing down");
+ LOG_INFO("DAP transaction stalled (WAIT) - slowing down and resending");
/* clear the sticky overrun condition */
retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
DP_CTRL_STAT, DPAP_WRITE,
el = list_first_entry(&replay_list, struct dap_cmd, lh);
tmp = dap_cmd_new(dap, JTAG_DP_DPACC,
DP_SELECT, DPAP_WRITE, (uint8_t *)&el->dp_select, NULL, 0);
- if (tmp == NULL) {
+ if (!tmp) {
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
retval = adi_jtag_dp_scan_cmd_sync(dap, el, NULL);
if (retval != ERROR_OK)
break;
- log_dap_cmd("REC", el);
+ log_dap_cmd(dap, "REC", el);
if (el->ack == JTAG_ACK_OK_FAULT) {
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(el->invalue);
}
if (el->ack != JTAG_ACK_WAIT) {
LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack);
- log_dap_cmd("ERR", el);
+ log_dap_cmd(dap, "ERR", el);
retval = ERROR_JTAG_DEVICE_ERROR;
break;
}
- LOG_INFO("DAP transaction stalled during replay (WAIT) - resending");
+ LOG_DEBUG("DAP transaction stalled during replay (WAIT) - resending");
/* clear the sticky overrun condition */
retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
DP_CTRL_STAT, DPAP_WRITE,
if (ctrlstat & SSTICKYORUN)
LOG_DEBUG("JTAG-DP STICKY OVERRUN");
- /* Clear Sticky Error Bits */
+ /* Clear Sticky Error and Sticky Overrun Bits */
retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
DP_CTRL_STAT, DPAP_WRITE,
- dap->dp_ctrl_stat | SSTICKYERR, NULL, 0);
+ dap->dp_ctrl_stat | SSTICKYERR | SSTICKYORUN, NULL, 0);
if (retval != ERROR_OK)
goto done;
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